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Packaging material for batteries, method for producing same, polybutylene terephthalate film for packaging material for batteries, and battery

A technology of polybutylene terephthalate film and polybutylene terephthalate, which is applied in battery pack parts, chemical instruments and methods, circuits, etc., can solve problems such as warping easily. Achieve the effect of not easy to warp and excellent formability

Active Publication Date: 2019-11-12
DAI NIPPON PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, although polybutylene terephthalate has excellent crystallinity, dimensional stability, thermal stability, and chemical resistance, it tends to warp more easily than polyethylene terephthalate. The problem

Method used

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  • Packaging material for batteries, method for producing same, polybutylene terephthalate film for packaging material for batteries, and battery
  • Packaging material for batteries, method for producing same, polybutylene terephthalate film for packaging material for batteries, and battery
  • Packaging material for batteries, method for producing same, polybutylene terephthalate film for packaging material for batteries, and battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1－3

[0164]

[0165] The barrier layer is laminated on the substrate layer by dry lamination. As the base material layer, a biaxially stretched polybutylene terephthalate film (PBT film) whose relationship (X / Y) between the puncture strength X and the thickness Y described later was the value shown in Table 1 was used, respectively. In addition, as the barrier layer, an aluminum alloy foil (JIS H4160: 1994A8021HO, thickness 35 μm) having both surfaces subjected to chemical surface treatment was used. Specifically, a two-component polyurethane adhesive (polyol compound and aromatic isocyanate compound) was applied to one surface of the aluminum alloy foil to form an adhesive layer (thickness: 3 μm) on the barrier layer. Next, the adhesive layer and the substrate layer on the barrier layer were laminated, and then aging treatment was performed at 40° C. for 24 hours, thereby producing a laminate of substrate layer / adhesive layer / barrier layer. Among them, the chemical surface trea...

reference example 1

[0177]

[0178]It carried out similarly to Example 1, and produced the laminated body of a base material layer / adhesive layer / barrier layer. Next, on the barrier layer of the laminate, an adhesive layer (thickness 15 μm, arranged on the barrier layer side) made of maleic anhydride-modified polypropylene resin and a heat-bonded adhesive layer made of random polypropylene resin were coextruded. Resin layer (thickness 15 μm, innermost layer), thereby obtaining a laminated film in which a substrate layer, an adhesive layer, a barrier layer, an adhesive layer, and a thermally fusible resin layer are laminated in this order. Next, the laminated film was subjected to an aging step to obtain a battery packaging material of Reference Example 1. In Reference Example 1, the aging step was performed at 40° C. for 48 hours.

[0179] In the manufacturing process of the battery packaging material of Reference Example 1, the polybutylene terephthalate film was exposed to a temperature T (°...

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Abstract

Provided is a packaging material for batteries, which is not susceptible to warping, while having excellent formability. A packaging material for batteries according to the present invention is configured from a laminate that is sequentially provided at least with one or more substrate layers, a barrier layer, a cured resin layer and a thermally fusible resin layer in this order. At least one of the substrate layers is formed of a polybutylene terephthalate film; and the value (X / Y) which is obtained by dividing the puncture strength X (N) of the laminate by the thickness Y ([mu]m) of the polybutylene terephthalate film, said puncture strength X (N) being determined by piercing the laminate from the substrate layer side by a method that complies with the prescription of JIS Z1707 (1997), is 1.02 N / [mu]m or more.

Description

technical field [0001] The present invention relates to a packaging material for batteries, a production method thereof, a polybutylene terephthalate film for packaging materials for batteries, and a battery. Background technique [0002] Currently, various types of batteries are being developed, and packaging materials for encapsulating battery elements such as electrodes and electrolytes are indispensable components in various batteries. At present, metal packaging materials are often used as packaging for batteries. [0003] On the other hand, in recent years, as the performance of electric vehicles, hybrid electric vehicles, computers, cameras, mobile phones, etc. has increased, various shapes have been required for batteries, and thinner and lighter weights have also been demanded. However, metal packaging materials for batteries that are widely used at present have the disadvantages that it is difficult to cope with the diversification of shapes, and there is also a l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02H01G11/78H01M50/119H01M50/121H01M50/129H01M50/131H01M50/133
CPCY02E60/10H01M50/133H01M50/121H01M50/129H01M50/131H01M50/119H01M50/1243H01M50/1245H01M50/126B32B27/08B32B27/32B32B27/36B32B27/38B32B2250/04B32B2250/24
Inventor 平木健太高萩敦子山下力也
Owner DAI NIPPON PRINTING CO LTD